Fix typos in README and source comments

src/helpers/radiolib/CustomLR1110.h

@@ -10,7 +10,7 @@ class CustomLR1110 : public LR1110 {
     size_t getPacketLength(bool update) override {
       size_t len = LR1110::getPacketLength(update);
       if (len == 0 && getIrqStatus() & RADIOLIB_LR11X0_IRQ_HEADER_ERR) {
-        // we've just recieved a corrupted packet
+        // we've just received a corrupted packet
         // this may have triggered a bug causing subsequent packets to be shifted
         // call standby() to return radio to known-good state
         // recvRaw will call startReceive() to restart rx